<nz-upload nzType="drag" 
  [nzMultiple]="true" 
  [nzDirectory]="false" 
  [nzLimit]="2" 
  [nzDirectory]="false"
  nzFileType="image/png,image/jpeg,image/gif,image/bmp,image/svg"
  [nzAction]="uploadUrl"
  [nzDisabled]="uploadDisable"
  [nzHeaders]="getHeaders()"
  (nzChange)="handleChange($event)">
  <p class="ant-upload-drag-icon">
    <i nz-icon type="inbox"></i>
  </p>
  <p class="ant-upload-text" *ngIf="!uploadDisable">单击此处或者拖入文件</p>
  <p class="ant-upload-text" *ngIf="uploadDisable">请不要在根目录上传文件</p>
</nz-upload>